CN215771337U

CN215771337U - Power battery box assembly and power battery

Info

Publication number: CN215771337U
Application number: CN202122185638.5U
Authority: CN
Inventors: 高妍; 刘涛; 赵豪儒; 符运喜
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-08
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a power battery box body assembly and a power battery, and belongs to the technical field of vehicles. The power battery box assembly comprises a box body and two end plates, wherein air outlet channels can be formed between two side walls of the box body and a battery module; the two end plates are respectively arranged at the two ends of the box body so as to seal the openings at the two ends of the box body. The power battery box body assembly is formed by assembling the box body and the two end plates, so that the manufacturing cost can be reduced. The battery module direct fixation in the diapire of box can form two air-out passageways simultaneously between the both sides of battery module and two lateral walls of box, need not to set up independent air-out structure, can reduce the volume of power battery box assembly to reduce the cost of power battery box assembly. The arrangement of the air outlet hole can reduce the air outlet flow resistance. According to the power battery, the power battery box body assembly is applied, so that the manufacturing cost is reduced, and the volume of the power battery box body assembly is reduced.

Description

Power battery box assembly and power battery

Technical Field

The utility model relates to the technical field of vehicles, in particular to a power battery box assembly and a power battery.

Background

The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts.

Current power battery, its battery module pass through the support mounting in power battery box, and the existence of support makes to have the clearance between the diapire of battery module and box, and then leads to the height of box higher, and the volume is great. Moreover, the power battery cases are mostly manufactured in an integrated forming mode, high-drawability materials are needed, and repeated drawing is needed, so that the manufacturing process is complex, and the manufacturing cost is high. In addition, in order to improve the heat dissipation performance of the battery pack, part of the existing power battery box bodies are provided with independent ventilation structures through the power battery box bodies, so that the battery pack is cooled, the ventilation structures also need to occupy the internal space of the power battery box bodies, the size of the power battery box bodies is large, and the cost of the box bodies is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a power battery box assembly, which is used for simplifying the structure of the power battery box assembly, reducing the manufacturing cost and reducing the volume of the power battery box assembly.

Another object of the present invention is to provide a power battery, which simplifies the structure of the power battery case assembly, reduces the manufacturing cost, and reduces the volume of the power battery case assembly by applying the above battery case assembly.

In order to realize the purpose, the following technical scheme is provided:

in one aspect, a power battery box assembly is provided, including:

the box body is of a U-shaped structure, the bottom wall of the box body is used for placing a battery module, and air outlets can be formed between two side walls of the box body and the battery module;

the two end plates are respectively arranged at the two ends of the box body so as to seal the openings at the two ends of the box body to form an installation cavity; at least one of the end plates is provided with an air outlet hole, and the air outlet hole is communicated with the air outlet channel.

As an alternative of the power battery box body assembly, mounting bracket assemblies are arranged on two side walls of the box body and are used for connecting a vehicle body.

As an alternative of a power battery box body assembly, the two mounting bracket assemblies comprise first mounting bracket assemblies, each first mounting bracket assembly comprises an angle steel, the angle steel is fixedly mounted at the transition position of the side wall and the bottom wall of the box body, and the angle steel is provided with a first connecting hole.

As an alternative of the power battery box assembly, two of the mounting bracket assemblies further include a second mounting bracket assembly, the second mounting bracket assembly includes a plurality of bracket units, and each bracket unit includes:

the first mounting piece is of an L-shaped structure, one side face of the first mounting piece is fixedly arranged on the side wall of the box body, and the other side face of the first mounting piece is provided with a second connecting hole;

the second mounting piece is of an L-shaped structure, the second mounting piece is attached to and fixedly connected to the bottom surface of the first mounting piece, the second mounting piece is provided with a mounting groove, a third connecting hole is formed in the bottom of the mounting groove, and the third connecting hole is superposed with the central line of the second connecting hole;

the bushing is arranged in the mounting groove, two ends of the bushing are fixedly connected with the first mounting piece and the second mounting piece respectively, and a center hole of the bushing is overlapped with center lines of the second connecting hole and the third connecting hole.

As an alternative of the power battery box body assembly, the first mounting piece is provided with a first reinforcing rib; and a second reinforcing rib is arranged on the second mounting piece.

As an alternative of the power battery box assembly, the bottom wall of the box body is provided with a plurality of first fasteners, and the first fasteners are used for locking or unlocking the battery module and the bottom wall of the box body.

As an alternative of the power battery box assembly, the power battery box assembly further comprises an inner support arranged in the installation cavity, and the inner support is fixedly connected to the side wall of the box body.

On the other hand, the power battery comprises the power battery box body assembly and the battery module, wherein the battery module is fixedly arranged in the installation cavity, and the bottom of the battery module is abutted against the bottom wall of the box body.

As the alternative scheme of power battery, the battery module is equipped with two sets ofly, two sets ofly the battery module interval sets up to be two sets ofly form the air inlet duct between the battery module.

As an alternative to the power battery, the power battery box assembly further includes an air inlet baffle plate configured to close a top portion and one end portion of the air inlet duct, and the other end of the air inlet duct is configured to communicate with an external air flow source.

Compared with the prior art, the utility model has the beneficial effects that:

the power battery box assembly comprises a box body and two end plates, wherein the box body is of a U-shaped structure, the bottom wall of the box body is used for placing a battery module, and air outlets can be formed between two side walls of the box body and the battery module; the two end plates are respectively arranged at the two ends of the box body so as to seal the openings at the two ends of the box body to form an installation cavity; at least one end plate is provided with an air outlet hole which is communicated with the air outlet channel. The power battery box body assembly is formed by assembling the box body and the two end plates, and the box body and the end plates are manufactured separately, so that the difficulty of a forming process can be reduced, and the manufacturing cost is further reduced. Compared with the installation mode that the battery module is fixed on the bottom wall of the box body through the bracket in the prior art, the battery module is directly fixed on the bottom wall of the box body, so that the height occupied by the battery module in assembly can be reduced, the height of the box body is further reduced, the volume of a power battery box body assembly is reduced, and the whole vehicle arrangement is facilitated. After the battery module is fixedly installed in the installation cavity, two air outlet channels can be formed between the two sides of the battery module and the two side walls of the box body, independent air outlet structural members do not need to be arranged, the space occupied in the installation cavity can be further reduced, the size of the power battery box body assembly is reduced, and the cost of the power battery box body assembly is reduced. Meanwhile, the air outlet holes can reduce air outlet flow resistance and quickly lead out the air flow after heat absorption.

According to the power battery, the structure of the power battery box body assembly is simplified, the manufacturing cost is reduced, and the volume of the power battery box body assembly is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a battery module and a power battery box assembly after assembly in the embodiment of the utility model;

FIG. 2 is a schematic view of the assembly of an air inlet baffle to an air inlet duct in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a power battery box assembly according to an embodiment of the present invention;

FIG. 4 is an exploded view of a power battery case assembly according to an embodiment of the present invention;

FIG. 5 is an exploded view of a rack unit in an embodiment of the present invention;

fig. 6 is a schematic view illustrating a connection relationship between a battery module and a case according to an embodiment of the present invention.

Reference numerals:

100. a battery module;

1. a box body; 11. an air outlet channel; 12. a mounting cavity; 13. an air inlet duct; 14. flanging the box body; 15. a first fastener;

2. an end plate; 21. an air outlet; 22. flanging the end plate;

3. an air inlet baffle;

4. an air inlet pipe;

51. a first mounting bracket assembly; 511. angle steel; 5111. a first connection hole; 512. a reinforcing gasket; 513. positioning the long hole; 52. a second mounting bracket assembly; 521. a holder unit; 5211. a first mounting piece; 52111. a second connection hole; 52112. a first reinforcing rib; 5212. a second mounting piece; 52121. mounting grooves; 52122. a third connection hole; 52123. a second reinforcing rib; 5213. a bushing;

6. an inner support; 61. a second fastener.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1-6, the present embodiment provides a power battery case assembly and a power battery, the power battery includes a power battery case assembly and a battery module 100, wherein the power battery case assembly includes a case 1 and two end plates 2, the case 1 is a U-shaped structure, the bottom wall of the case 1 is used for placing the battery module 100, and air outlets 11 can be formed between two side walls of the case 1 and the battery module 100; the two end plates 2 are respectively arranged at two ends of the box body 1 so as to seal openings at two ends of the box body 1 to form a mounting cavity 12; at least one end plate 2 is provided with an air outlet 21, and the air outlet 21 is communicated with the air outlet channel 11. The battery module 100 is fixedly arranged in the installation cavity 12, and the bottom of the battery module 100 is directly abutted against the bottom wall of the box body 1.

The power battery box body assembly is formed by assembling the box body 1 and the two end plates 2, and the box body 1 and the end plates 2 are manufactured separately, so that the difficulty of a forming process can be reduced, and the manufacturing cost is further reduced. Compare with the mounting means that battery module 100 is fixed in the diapire of box 1 through the support among the prior art, this embodiment can reduce the height that battery module 100 assembly occupy with battery module 100 snap-on in the diapire of box 1, and then reduces the height of box 1 to reduce the volume of power battery box assembly, do benefit to whole car and arrange. After the battery module 100 is fixedly installed in the installation cavity 12, two air outlet channels 11 can be formed between two sides of the battery module 100 and two side walls of the box body 1, an independent air outlet structural member is not required to be arranged, the space occupied in the installation cavity 12 can be further reduced, the size of the power battery box body assembly is reduced, and the cost of the power battery box body assembly is reduced. Meanwhile, the arrangement of the air outlet 21 can reduce the air outlet flow resistance and quickly lead out the air flow after heat absorption.

Alternatively, as shown in fig. 1-2, the battery modules 100 are provided in two groups, and the two groups of battery modules 100 are spaced apart to form the air inlet duct 13 between the two groups of battery modules 100. The gap between the battery modules 100 is used as the air inlet duct 13, an independent air inlet structural member is not required to be arranged, the space occupied by the mounting cavity 12 can be further reduced, the size of the power battery box assembly is reduced, and the cost of the power battery box assembly is reduced.

Optionally, in order to ensure that the air flow can completely enter the air inlet duct 13, the power battery box assembly further includes an air inlet baffle plate 3, the air inlet baffle plate 3 is configured to seal the top and one end of the air inlet duct 13, and the other end of the air inlet duct 13 is configured to be communicated with an external air flow source, so that the air flow entering the air inlet duct 13 can only enter a gap between the battery cells in the battery module 100, and the battery cells are cooled, which has a good cooling effect. Furthermore, the power battery box assembly further comprises an air inlet pipe 4, in this embodiment, the air inlet pipe 4 is arranged through one of the end plates 2, one end of the air inlet pipe 4 extending out of the installation cavity 12 is fixedly connected to the open end of the air inlet duct 13, and almost all air flow in the air inlet pipe 4 enters the air inlet duct 13, so that the cooling effect can be further improved. Illustratively, the air inlet pipe 4 can be connected with an air conditioning structure of a vehicle, so as to lead cold air generated by an air conditioner into the installation cavity 12, and the cooling effect is better.

In this embodiment, the box body 1 and the two end plates 2 are formed by a stamping process, and the two end plates 2 are welded at two ends of the box body 1 by a welding method after the forming. Specifically, in order to improve the strength of the box body 1 and the two end plates 2, the side wall and the bottom wall of the box body 1 and the two end plates 2 are provided with reinforcing ribs.

Further, as shown in fig. 3, two air outlets 21 are provided, in this embodiment, the two air outlets 21 are disposed on the same end plate 2, and the two air outlets 21 and the two air outlets 11 are disposed in a one-to-one correspondence, so that the air flow in the air outlets 11 can be quickly discharged through the air outlets 21. In other embodiments, two air outlets 21 may be disposed on the two end plates 2, respectively, that is, each end plate 2 is provided with one air outlet 21.

Optionally, in order to facilitate the installation of the power battery, the power battery box assembly further comprises an inner bracket 6 disposed in the installation cavity 12, and the inner bracket 6 is fixedly connected to the side wall of the box body 1. In addition to the battery module 100, other elements such as a controller of a power battery are mounted in the mounting cavity 12, and the elements are disposed above the battery module 100 through a bracket, in this embodiment, the number of the inner brackets 6 is multiple, the multiple inner brackets 6 are welded to one side wall of the box body 1 at intervals, one side of the bracket can be fixed on the inner bracket 6, and the other side of the bracket is fixed to the other side wall of the box body 1 through a fastener such as a bolt. Further, the inner bracket 6 is fixedly mounted with a second fastener 61, and the bracket can be fixed to the inner bracket 6 using the second fastener 61. In this embodiment, the second fastening member 61 is also a bolt, the bolt is welded to the inner bracket 6, and when the bracket is installed, the bolt is inserted into the fixing hole of the bracket, and then the bracket is fixed by screwing and tightening the bolt with a nut.

Optionally, as shown in fig. 3, the side wall of the box 1 is provided with a box flange 14, the two end plates 2 are provided with end plate flanges 22, the box flange 14 and the two end plate flanges 22 form a connecting flange, and the connecting flange is used for being connected with a cover body of the power battery box assembly, so that the mounting cavity 12 is sealed by the cover body, and the battery module 100 is protected.

Optionally, both side walls of the box body 1 are provided with mounting bracket assemblies for connecting a vehicle body. Illustratively, two mounting bracket assemblies are fixed on the corresponding side walls of the box body 1 in a welding manner, so that the power battery box body assembly is fixedly mounted on the vehicle body through the two mounting bracket assemblies. Optionally, the two mounting bracket assemblies include a first mounting bracket assembly 51, the first mounting bracket assembly 51 includes an angle steel 511, the angle steel 511 is fixedly mounted at a transition position between the side wall and the bottom wall of the box body 1, and the angle steel 511 is provided with a first connection hole 5111. Specifically, two side surfaces of the angle steel 511 are respectively attached to the side wall and the bottom wall of the box body 1, and the box body 1 can be stably supported by the angle steel 511. In this embodiment, the length of the angle steel 511 is greater than that of the box body 1, and the two ends of the angle steel 511 are respectively located at the outer sides of the two ends of the box body 1, further, the number of the first connection holes 5111 is two, the two first connection holes 5111 are respectively located at the two ends of the angle steel 511, and the angle steel 511 and the vehicle body can be fixedly connected by passing fasteners such as bolts through the first connection holes 5111. Specifically, reinforcing gaskets 512 can be arranged at two ends of the angle steel 511, fasteners such as bolts penetrate through the reinforcing gaskets 512 and then are inserted into the first connecting hole 5111, and the reinforcing gaskets 512 are arranged between the bolts and the angle steel 511 in a cushioning manner, so that the local stress of the angle steel 511 can be prevented from being too large, and the effect of preventing the angle steel 511 from deforming is achieved.

Further, in order to facilitate the rapid positioning of the angle steel 511 and the vehicle body when the power battery is assembled with the vehicle body, the angle steel 511 is further provided with a positioning long hole 513 matched with a vehicle body positioning column.

Optionally, the two mounting bracket assemblies further include a second mounting bracket assembly 52, the second mounting bracket assembly 52 includes a plurality of bracket units 521 arranged at intervals, as shown in fig. 5, each bracket unit 521 includes a first mounting piece 5211, a second mounting piece 5212 and a bushing 5213, the first mounting piece 5211 is an L-shaped structure, one side surface of the first mounting piece 5211 is fixedly arranged on the side wall of the box body 1, and the other side surface of the first mounting piece 5211 is provided with a second connecting hole 52111; the second mounting piece 5212 is an L-shaped structure, the second mounting piece 5212 is attached to and fixedly connected to the bottom surface of the first mounting piece 5211, the second mounting piece 5212 is provided with a mounting groove 52121, a third connecting hole 52122 is formed in the bottom of the mounting groove 52121, and the center line of the third connecting hole 52122 coincides with the center line of the second connecting hole 52111; the bush 5213 is disposed in the mounting groove 52121, both ends of the bush 5213 are fixedly connected to the first mounting piece 5211 and the second mounting piece 5212, respectively, and the center hole of the bush 5213 coincides with the center lines of the second connection hole 52111 and the third connection hole 52122. Exemplarily, one side surface of the first mounting piece 5211 is welded to the side wall of the box body 1, the second mounting piece 5212 is attached to and welded to the bottom surface of the first mounting piece 5211, so as to increase the strength of the first mounting piece 5211, and the bushing 5213 is supported between the first mounting piece 5211 and the second mounting piece 5212, so that the local stress around the second connecting hole 52111 and the third connecting hole 52122 can be prevented from being too large, and the effect of further improving the strength of the first mounting piece 5211 and the second mounting piece 5212 is also achieved.

Alternatively, as shown in fig. 5, in order to improve the strength of the first mounting piece 5211, a first reinforcing rib 52112 is provided on the first mounting piece 5211. Preferably, the first reinforcing rib 52112 is provided at the middle of the first mounting piece 5211. Further, the second ribs 52123 are provided on the second mounting piece 5212, which can improve the strength of the second mounting piece 5212. Preferably, the first reinforcing rib 52112 is provided at the middle of the first mounting piece 5211.

Alternatively, as shown in fig. 6, the bottom wall of the case 1 is provided with a plurality of first fastening members 15, and the first fastening members 15 are used to lock or unlock the battery module 100 with the bottom wall of the case 1. Specifically, a plurality of first fasteners 15 fixed mounting are in the diapire of box 1, and in this embodiment, first fastener 15 is the bolt, and the bolt welding is in the diapire of box 1, only needs to align the bolt that corresponds with battery module 100's fixed orifices, makes the bolt pass the fixed orifices, recycles nut and bolt spiro union and tighten, can be fixed with battery module 100.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a power battery box assembly which characterized in that includes:

the battery box comprises a box body (1), wherein the box body (1) is of a U-shaped structure, the bottom wall of the box body (1) is used for placing a battery module (100), and air outlet channels (11) can be formed between two side walls of the box body (1) and the battery module (100);

the two end plates (2) are respectively arranged at two ends of the box body (1) so as to seal openings at two ends of the box body (1) to form a mounting cavity (12); at least one end plate (2) is provided with an air outlet (21), and the air outlet (21) is communicated with the air outlet channel (11).

2. The power battery box assembly as claimed in claim 1, wherein two side walls of the box (1) are provided with mounting bracket assemblies for connecting with a vehicle body.

3. The power battery box assembly as claimed in claim 2, wherein the two mounting bracket assemblies include a first mounting bracket assembly (51), the first mounting bracket assembly (51) includes an angle steel (511), the angle steel (511) is fixedly mounted at a transition of a side wall and a bottom wall of the box body (1), and the angle steel (511) is provided with a first connecting hole (5111).

4. The power battery box assembly according to claim 2, wherein a second mounting bracket assembly (52) is further included in the two mounting bracket assemblies, the second mounting bracket assembly (52) includes a plurality of bracket units (521), and each bracket unit (521) includes:

the first mounting piece (5211), the first mounting piece (5211) is of an L-shaped structure, one side surface of the first mounting piece (5211) is fixedly arranged on the side wall of the box body (1), and the other side surface of the first mounting piece (5211) is provided with a second connecting hole (52111);

the second mounting piece (5212), the second mounting piece (5212) is of an L-shaped structure, the second mounting piece (5212) is attached to and fixedly connected to the bottom surface of the first mounting piece (5211), the second mounting piece (5212) is provided with a mounting groove (52121), a third connecting hole (52122) is formed in the bottom of the mounting groove (52121), and the center line of the third connecting hole (52122) coincides with the center line of the second connecting hole (52111);

the bush (5213), bush (5213) are located in mounting groove (52121), the both ends of bush (5213) respectively with first installation piece (5211) and second installation piece (5212) fixed connection, the centre bore of bush (5213) with the second connecting hole (52111) and the central line coincidence of third connecting hole (52122).

5. The power battery box assembly as claimed in claim 4, wherein the first mounting piece (5211) is provided with a first reinforcing rib (52112); the second mounting piece (5212) is provided with a second reinforcing rib (52123).

6. The power battery box assembly as claimed in claim 1, wherein the bottom wall of the box (1) is provided with a plurality of first fasteners (15), and the first fasteners (15) are used for locking or unlocking the battery module (100) with the bottom wall of the box (1).

7. The power battery box assembly according to claim 1, further comprising an inner bracket (6) disposed in the mounting cavity (12), wherein the inner bracket (6) is fixedly connected to a side wall of the box (1).

8. A power battery, comprising the power battery case assembly according to any one of claims 1 to 7 and a battery module (100), wherein the battery module (100) is fixedly arranged in the mounting cavity (12), and the bottom of the battery module (100) abuts against the bottom wall of the case (1).

9. The power battery according to claim 8, characterized in that the battery modules (100) are provided in two groups, and the two groups of battery modules (100) are arranged at intervals to form an air inlet duct (13) between the two groups of battery modules (100).

10. The power battery according to claim 9, wherein the power battery box assembly further comprises an air inlet baffle (3), the air inlet baffle (3) is configured to close the top and one end of the air inlet duct (13), and the other end of the air inlet duct (13) is configured to communicate with an external air flow source.